Bending-machine.



T. F. PHILIPPI.

BBNDING MACHINE. APPLIUATION FILED SEPT. 25, 1913.

1,097,874, I Patented May 26, 1914,

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LLL u i inventor: flbbwb T. .Philip 1 ,gwgw v x COLUMBIA PLANOGRAPH120.. WASHINGTON, D. c.

THEODORE r. rnitirri, OE-EAST. s1. Louis, rumors.

BENDING-MACHINE I Specification of Letters Patent.

Patented May 26, 1914.

Application filed September 25, 1913, Serial No. 791,755.

To all whom it may concern Be it known that I, THEODORE F. PHILIPPI,

a citizen of the United States of America, and a resident of the city ofEast St. Louis, in the county of St. Clair and State of Illi nois, haveinvented certain new and useful Improvements in Bending Machines, ofwhich the following is a full, clear,.and ex-- act description,reference being had to the accompanying drawings, forming a part of thisspecification.

My invention relates to a simple machine for bending a variety ofobjects of various thicknesses and shapes, the machine being soconstructed as to permit quick adjustment of its parts, in order that itwill be operable in bending difierent thicknesses of material,

and pro duce required bends and numerous degrees of angles, with theinner corners of the bends either sharp or round, as may be desired.

Figure I is a perspective view of my bending machine. Fig. II is avertical longitudinal section through my machine. Fig. III is a verticalcross section through the machine, at the location of the rotatablearbor. Fig. IV is an enlarged side elevation of the forward port-ion ofthe machine, with the parts shown in the positions assumed in a bendingoperation, a portion of the base section of-the machine being broken outto afford a view of the stepped gage at the far side of the machine.

Inthe drawings: A designates the base section of my machine, and B thetop section.

The base section A includes an arbor box 1 located near the front end ofthe section, in which is a bore extending transversely of said section,in which'is a bending arbor to be hereinafter more particularly referredto. The base section'also includes a table 2 extending rearwardly fromthe arbor box 1, at the rear end of which is a vertical abutment 3.

4 is a front horizontal extension projecting from the arbor box 1, andconstituting an abutment.

5 designates a-j aw at one side of the base section A, contiguous'to thearbor box 1, and having its forward end extended partially across thebore in said box.

The top section B of my bending machine is located immediately above thebase section, and is provided at one side with a jaw 7 overlying the jaw5 of the base section and movable toward and away from said jaw 5.

The jaw 7 likethe jaw 5, extends partially acrossthe bore in the arborbox 1, and said aw is preferably provided at its bottom with a wearplate 8, of steel, or other hard wear resisting material.

The top section B is tiltably supported on the base section A by fulcrumscrews 9,

which extend vertically through the top sec tion and rest upon thetableof the bottom section, the said screws being located near the rear endof the top section. The forward end of the top section is normally heldin elevated position, and returned to an elevated position after it hasbeen depressed, by means hereinafter described, by a lift spring 10,surmounting the tail end of the section back of the fulcrum screws 9,the said spring being arranged around a post 11 attached to the basesection and extending through a slot 12 in the top section, said postbeing screw threaded at its upper end and having thereon a nut 13, bywhich the spring 10 may be placed under tension.

let designates a screw post extending vertically from the arbor box 1,and through a slot 15 in the top section B. This post is provided with aclamp nut 16, by which downward pressure may be exerted upon the forwardend of the top section to move the,

jaw 7 of said section toward the jaw 5 of the base section to clamp apiece of material to'be bent between said jaws.

17 designates a horizontal adjusting screw in the rear abutment 3, ofthe base section A.

This screw extends longitudinally of the machine and bears against therear end of the top section, and it is employed in the adj ustment ofthe top section of my machine, in order that'the jaw 7 of said sectionmay be properly adjusted,forwardly orbackwardly, relative to the jaw ofthe base section, as is necessary for bending objects of differentthicknesses or bending the objects with angles of different degrees. A

At the front end of the top section B is a downwardly extending lug 18,which engages the side face of the abutment extension 4: of the basesection, and at the rear end of said top section is a horizontal lug19,which bears against the rear abutment 3 on, the base section. Thefront lug 18 bears against the abutmentextension 1 at the side of saidabutment farthest from the jaws 5 and 7, and the lug 19 bears againstthe abutment 3 at the side of said abutment corresponding to that atwhich said jaws are located, this arrangement hein made for a purposethat will be hereinafter made plain.

21 designates a rotatable arbor mounted in the arbor box 1 of the basesection A, the

said arbor being therefore arranged trans versely of the machine. Oneend of this arbor is contiguous to the jaws 5 and. 7, and the arbor isprovided at its end with a presser arm or segment 22, movable around theaxis of the arbor so that it approaches the upper jaw 7 when the arboris rotated to bend an object clamped between the jaws. The presser armis preferably provided with a wear plate 23. The bending arbor is heldfrom longitudinal movement by a retaining screw 2-1 extending throughthe arbor box into the groove 21 in the arbor.

Rotation is imparted to the bending arbor by a handle bar 25, whichextends transversely through the arbor at its end opposite that providedwith the presser arm 22, the said handle bar being held in adjustedpositions in said arbor by a set screw 26 mounted in the arbor.

2T designates a gage projecting from the base section of my machine atthe side of the machine at which the handle bar 25 is located. This gagecomprises a plurality of steps at different distances from the axis ofthe bending arbor, any of which may receive the engagement of the reararm of the handle bar 25, to regulate the degree of movement of thehandle bar and, consequently, the degree of rotation of the arbor.Determination of the step of the gage which receives the engagement ofthe handle bar is made by longitudinal movement of the bar in the arbor,so that the rear arm of the handle bar will extend to a greater or lessdegree beyond the arbor and will, when the handle bar is moved, strike astep of the gage in the path of its movement, which is first within thecompass of movement of the handle bar arm.

28 designates stop screws arranged in the extension a of the basesection A, by which the downward movement of the front end of the topsection B may be limited. These screws serve to prevent an excessivestrain being imposed upon the top section by the operation of theclamping nut 16, clamping an object between the jaws 7 and 5, and aremore particularly important in avoiding breakage of the jaw 7 by suchstrain.

In the practical use of my bending machine, the upper section B of themachine is normally upheld at its forward end by the lift spring 10, sothat the jaw 7 of said section is separated from the jaw 5 of the basesection a distance sutlicient to permit of the introduction of an objectto be bent between said jaws. At this time, the presser arm 22 of thebending arbor 21 is in a lowered position, as seen in Fig. I, so thatits face which is to engage the object positioned between the jaws is inthe same plane, or beneath the plane, of the top surface of the lowerjaw. In positioning the object to be bent between the jaws, the properplacing of the object is facilitated due to the side of the base sectionabove said jaw being flat, and also due to the outer faces of the jawsbeing flat and, therefore, the object to be bent may be readily squaredrelative to the arbor before the bending operation takes place. Afterthe object to be bent has been disposed between the jaws 5 and 7, theupper jaw 7 is moved downwardly into clamping engagement with saidobject by manipulation of the clamping nut 16 on the post 14-, whichcauses the forward end of the entire top section to be depressed for thedesired movement of'the jaw carried thereby. The object to be operatedupon now extends over the working face of the arbor presser arm and thebending operation is effected by rotating the arbor, through the mediumof the handle bar 25, and the rotation of the arbor causes the presserarm to move forwardly and upwardly in an arc of a circle, the movementin such direct-ion being continued until the desired bend has beeneffected.

In the illustration in Fig. IV, the bend secured by the movement of thebending arbor is a right angled one, and when a bend of this degree iseffected, the handle bar strikes against the top step of the gage 27,due to the rear arm of said bar being of such length that it will notpass said step. It will be obvious that if the rear arm of the handlebar is shortened by adjustment of the bar in the arbor, the objectbetween the jaws may be bent to a greater degree, and the arm of thehandle bar will strike a lower step; and it will also be obvious that abend of less degree than that illustrated in Fig. IV may be obtained byless rotation of the bending arbor.

The lug 18 and 19 of the top section B and the abutments 4 and 3 of thebase section which receive said lugs are important features of mymachine, in that they seive to hold the top section in alinement withthe base section when it is subjected to lateral strain by pressureagainst the jaw 7 transmit-ted from the presser arm of the arbor. Thisis particularly important in view of the jaws being located at the sideof the machine, so that there is a twisting strain imposed on the uppersection during the act of bending an object clamped between the jaws.

I claim 1. A bending machine comprising a'bottom section having a sidejaw, a top section surmounting said bottom section having a side jawoverlying the jaw of the bottom section, the top section being providedwith forward and rear longitudinal slots, a fulcrum for said top sectionlocated intermediate of said slots, a clamping post extending from saidbottom section through said forward slot, a post extending from saidbottom section through said rear slot, a

- spring surrounding the last mentioned post by which said upper sectionmay be tilted on said fulcrum, and a bending arbor extendingtransversely through said bottom section and opposing the jaw of saidsection.

2. A bending machine comprising a bottom section having a side jaw, atop section surmounting said bottom section having a side jaw overlyingthe jaw of the bottom section, the top section being provided withforward and rear longitudinal slots, a fulcrum for said top sectionlocated intermediate of said slots, a clamping post extending from saidbottom section through said forward slot, a post extending from saidbottom section through said rear slot, the said slots permittinglongitudinal adjustment of said top section relative to said bottomsection, and a rotatable bending arbor extending transversely in saidbottom section having a work engaging element located opposite the jawof said bottom section.

3. A bending machine comprising a bottom section having a side jaw, atop section having a side jaw overlying the jaw of the bottom section,the said sections having slot and post connection with each otherpermitting adjustment of the top section longitudinally of the bottomsection, and said sections having cooperable abutments for preventingtwisting of the top section on the bottom section, and a bending arborrotatably mounted in said bottomsection having a work engaging elementopposed to the jaw of said bottom section.

4:. A bending machine comprising a pair of sections one of which ismovable relative to the other, the sections being provided with jawsbetween which an object to be bent may be positioned, a bending arborhaving a presser arm adapted to engage the object to be bent, a leverbar adjust-able in said arbor, means for holding said lever bar in adjusted positions in said arbor, and abutments located at differentdistances from the axis of said bending arbor and adapted to be engagedby said lever bar whereby the degree of rotation of said arbor isregulated.

5. A bending machine comprising a pair of sections one of which ismovable relative to the other, the sections being provided with jawsbetween which an object to be bent may be positioned, a bending arborhaving a presser arm adapted to engage the object to be bent, a leverbar adjustable in said arbor, means for holding said lever bar inadjusted positions in said arbor, and a stepped gage carried by one ofsaid sections adapted to receive said lever bar to limit the degree ofrotation of said arbor.

THEODORE F. PHILIPPI.

In the presence of- E. K. CLARK, E. B. LINN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of ZPatents,

Washington, D. G. V

